#303C56

#303C56

Color Values

HEX

#303C56

RGB

48, 60, 86

HSL

221.1, 28.4%, 26.3%

HSV

221.1, 44.2%, 33.7%

CMYK

44.2%, 30.2%, 0.0%, 66.3%

OKLCH

0.3574 0.0482 265.0

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#303C56

#564A30

Analogous

#304F56

#373056

#303C56

Triadic

#303C56

#56303C

#3C5630

Split Complementary

#303C56

#563730

#4F5630

Tetradic

#303C56

#56304F

#564A30

#305637

Color Blindness Simulation

Original

#303C56

Protanopia

#353550

Deuteranopia

#34344E

Tritanopia

#314B4A

Achromatopsia

#3B3B3B

CSS Usage

background-color: #303C56;
color: #303C56;
border-color: #303C56;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F6F7F9
100
#E9ECF1
200
#D1D8E5
300
#B0BBD3
400
#8697BB
500
#5B72A4
600
#495B83
700
#3A4969
800
#2E3952
900
#242C3D
950
#171C26

Contrast Checker

Text on white

11.02:1

AA Pass AAA Pass

Text on black

1.91:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026